It is NOT a felony or any other type of crime to put the brace, buffer tube, whatever against your shoulder. Let me clear up an important misconception. I have read that they use a whole tube of thread locker, so you will need a heat gun.

Sig might have the right tool as Mango said. The end of the tube has what appears to be a protrusion for a wrench, but the window of the same shape on my Hammerhead AR tool was too small. The instructions say it will fit, but I dont see how. I wanted to put it on an AR pistol that MUST have a buffer tube, but the brace was too loose. The brace itself is fairly straightforward to take off with back and forth rotation and gently pulling. There are other end caps online, eg Ace, but it costs about the same. SigSauer has the end cap for about $15 but shipping brings it to $37. Please feel free to email us with questions you may have.Yes, you can remove the brace and tube. It is your responsibility to be familiar with your current local gun laws BEFORE placing your order. We do not offer parts kits to any other states since it is only legal in CA. It is your responsibility to discuss this in advance with your dealer.

If you are located in California and are purchasing a rifle we will be glad to send the mag to the FFL dealer as a parts kit. There will be no discounts for removal of magazines or other custom magazine options offered. We cannot ship magazines to out of state addresses and we cannot alter or customize magazines at this time. PLEASE NOTE: If you live in a magazine restricted state and the magazine that comes with the firearm would be illegal, we will remove the magazine from the order and ship the firearm to the dealer without the magazine. The P556 SWAT is compatible with M16/AR-15 type magazines. The pistol ships standard with (1) 30-round magazine. The P556 SWAT comes equipped with a smooth two-stage trigger, ambidextrous safety and is designed to accept standard AR magazines. The P556 SWAT features a aircraft aluminum quad-rail designed for mounting accessories. The trigger housing is machined from an aircraft grade aluminum alloy forging with a hard-coat anodized finish designed to survive extreme conditions. The Picatinny rail features a SIG SAUER® Mini Red Dot sight that works in concert with the optional hooded front sight. The receiver is made of high strength steel with a durable wear-resistant Nitron® finish. The optional flip up front combat sight is adjustable for windage, rear for elevation. 5 x 28 TPI thread pattern, ensuring compatibility with after-market accessories. P556 SWAT features a 10” button rifled barrel, chambered in 5.56mm NATO, with a twist rate of 1 in 7”.

Sig 556 swat muzzle brake